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preenfm2 and preenfm3 / resisitor network orientation?
« on: January 02, 2019, 11:53:17 PM »
Hello!
My name is Ben, very excited about this synth! I've built a few little synths and things before (atmega and teensy based mostly), but this is my first ever PCB build!
My question is: which holes on the PCB correspond to the common grounds for the resistor networks?
I'm just troubleshooting/diagnosing and am not confident in my initial assumption that the square holes are ground (I used 16 10k resistors and just made my own networks, so it's not as simple as lining up the arrows). From looking at different sources it seems like sometimes these networks' common terminal is on pin 1 and sometimes on pin 9?) My local shop doesn't stock 9 pin networks so I bought a couple 11 pins today and trimmed off two of the leads, so I'll probably plop though in instead of messing around with all the extra solder points.
Not sure if this is where my issue is (blank screen, 3 solid leds), but I want to be sure I've got it right before moving forward with diagnostics. Lol I'll likely have another question or two if I can't get it figured out.
Thanks so much Xavier for your work on this project, it sounds like a terrific synth and I'm very excited to get to playing with it!
(edits: spelling)
My name is Ben, very excited about this synth! I've built a few little synths and things before (atmega and teensy based mostly), but this is my first ever PCB build!
My question is: which holes on the PCB correspond to the common grounds for the resistor networks?
I'm just troubleshooting/diagnosing and am not confident in my initial assumption that the square holes are ground (I used 16 10k resistors and just made my own networks, so it's not as simple as lining up the arrows). From looking at different sources it seems like sometimes these networks' common terminal is on pin 1 and sometimes on pin 9?) My local shop doesn't stock 9 pin networks so I bought a couple 11 pins today and trimmed off two of the leads, so I'll probably plop though in instead of messing around with all the extra solder points.
Not sure if this is where my issue is (blank screen, 3 solid leds), but I want to be sure I've got it right before moving forward with diagnostics. Lol I'll likely have another question or two if I can't get it figured out.
Thanks so much Xavier for your work on this project, it sounds like a terrific synth and I'm very excited to get to playing with it!
(edits: spelling)